The breach was covered up for more than a year.

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Around 2.7 million UK Uber users and drivers were affected in the hack

Sadiq Khan has spoken out about a “shocking” development in the Uber hack story, as the beleaguered taxi app firm admits millions of Brits’ details were stolen.

Around 2.7 million UK Uber passengers and drivers were affected by a global data hack that was covered up for more than a year, the company confirmed on Wednesday.

The stolen information included the names, email addresses and mobile phone numbers of passengers.

And speaking just weeks before the outcome of an appeal against Transport for London’s (TfL) decision to withdraw Uber’s operating licence in the capital, mayor Sadiq Khan said the news will “alarm” Londoners.

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Mayor of London Sadiq Khan spoke of the 'shocking' development in the Uber hack story on Wednesday

“The latest shocking development about Uber will alarm millions of Londoners whose personal data could have been stolen by criminals,” he said.

“Uber need to urgently confirm which of their customers are affected, what is being done to ensure these customers don’t suffer adversely, and what action is being taken to prevent this happening in future.”

Writing on Twitter this afternoon, Mayor of London Sadiq Khan said: “Uber need to urgently confirm which of their customers are affected, what is being done to ensure these customers don’t suffer adversely, and what action is being taken to prevent this happening again in the future.”

Uber CEO Dara Khosrowshahi said last week that the hacks should not have “happened, and I will not make excuses for it”.

“While I can’t erase the past, I can commit on behalf of every Uber employee that we will learn from our mistakes,” he said.

“We are changing the way we do business, putting integrity at the core of every decision we make and working hard to earn the trust of our customers.”

The Information Commissioner’s Office (ICO) has previously expressed “huge concerns” about the hack.

In a statement today, deputy commissioner James Dipple-Johnstone said that the stolen information was “unlikely to pose a direct threat to citizens” on its own.

“However, its use may make other scams, such as bogus emails or calls appear more credible. People should continue to be vigilant and follow the advice from the NCSC,” he said.

“We would expect Uber to alert all those affected in the UK as soon as possible.”